JPH0437946Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is mainly used to control the water level of the intake canal for agricultural crops when the water is discharged into a river etc. through a culvert. This invention relates to a sluice gate suitably used as an culvert sluice gate installed at the entrance of a culvert.

[Conventional technology]

With this type of sluice gate, if the water level on the outlet side becomes higher than the required water level in the intake channel, it is necessary to close the sluice gate at that point, but even if the sluice gate is closed, the water level on the intake channel side may reach a dangerous water level. . For this reason, in the past, pump equipment was provided around the water gate, and the water level on the intake channel side was adjusted by operating this pump equipment. Therefore, in the past, in addition to the water gate, large-scale drainage equipment, mainly including the above-mentioned pump equipment, was required, which posed the problem of requiring a vast space and huge equipment costs.

For this reason, recently, as disclosed in Japanese Patent Publication No. 56-5883, a group of pumps is installed in parallel via a pump mounting frame on one side of the door body constituting the water gate, and this group of pumps is installed on the side of the intake channel. A floodgate has been proposed that can lower the water level.

[Problems to be solved by the invention] However, in the water gate as disclosed in the above-mentioned Japanese Patent Publication No. 56-5883, there are two very heavy pump mounting frames on one side of the gate body. Since a very heavy pump group is provided, the following problems arise.

One side of the door body is much heavier than the other side, creating a large weight imbalance in the thickness direction of the door body, so when the door body is raised or lowered, an excessive unbalanced load is applied to the guide section, causing the guide parts get damaged quickly.

There are two extremely heavy pump mounting frames and a group of pumps on one side of the door body, and when the door body slides along the guide, large resistance is exerted due to the excessive unbalanced load mentioned above. A very large driving force is required to raise the door body.

If a water gate is used for a long period of time, where there is a large weight imbalance between one side of the gate body and the other side, even a small accident may lead to a major accident.

Therefore, in general, in a water gate where there is a large weight imbalance between one side and the other side of the gate body, the weight of the pump mounting frame and pump group on one side is also increased on the other side of the gate body. It is common to provide a balance weight that balances the But in this case,
A very heavy balance weight equivalent to the weight of the pump mounting frame and pump group is added to the other side of the door, so a very large driving force is required to raise the door. .

This invention was created in view of the above circumstances, and it is possible to balance the weight of the door body and prevent excessive unbalanced load from being applied to the guide when the door body is raised and lowered. The purpose is to provide a safe and economical water gate that requires less driving force to raise the gate body.

[Means for solving the problem] In order to achieve the above object, the present invention provides a water gate in which the waterway is opened and closed by raising and lowering the gate body along guides on both sides. a box-shaped door body formed by connecting a second box section with an open side on the other side below a first box section with an open side on one side of both sides of the box; a pipe installed between the upper plate and the lower plate of the first box part; a submersible pump installed in this pipe and whose suction port communicates with a communication hole bored in the lower plate of the first box part; The pipe includes a discharge part provided in the pipe above the discharge port of the submersible pump, and a check valve provided at the discharge port of the discharge part, and the pipe is provided with the submersible pump inside.
It is disposed within the first box portion at a position where the weight is balanced in the thickness direction and width direction of the door body.

[Function] According to the present invention, the tube with the submersible pump inside is provided in the first box of the door body and at a position where the weight is balanced in the thickness direction and width direction of the door body. A large weight imbalance does not occur in the thickness direction and width direction. Therefore, an excessive unbalanced load is not applied to the guide, and damage to the guide can be prevented.

In addition, because an excessive unbalanced load is not applied to the guide when the door body is raised or lowered, there is no large resistance between the guide and the guide, and there is no large weight imbalance in the thickness direction and width direction of the door body. There is no need to add heavy balance weights to the door body. Therefore, the driving force required to raise the door body is significantly reduced.

〔Example〕

Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 1 is a perspective view of the water gate according to the embodiment, FIG. 2 is a vertical sectional view of the main part showing the state of use, and FIG. 3 is a front view of the same. The water gate 1 is provided at the entrance of the culvert B to open and close between an intake channel A and a culvert B connected to a river (not shown) from which water from the intake channel A is discharged. 2 is the gate body of this water gate, and 3 and 3 are guide rails provided on both sides of the entrance of culvert B. That is, the door body 2 is guided by the guide rails 3, 3 on both sides and moves up and down, thereby allowing the door body 2 to move up and down the culvert B.
The entrance is designed to open and close. 4 is door body 2
A lifting rod connected to the upper end of the culvert is connected to an opening/closing device (not shown), and by driving this opening/closing device, the door body 2 is raised and lowered to open and close the entrance to the culvert B.

The door body 2 is formed by connecting a second box part 22, which has an open surface on the intake channel A side, to a lower part of the first box part 21, which has an open surface on the side of the culvert B, which is the discharge side. 21
The lower plate serves as the upper plate of the second box part 22 and serves as a partition plate 23 between both box parts.

Inside the first box part 21, two left-right symmetrical steel pipes 5, 5 are erected between the upper plate 24 and the partition plate 23 which is the lower plate of the first box part 21. The upper plate 24 of the first box part 21 has the steel pipes 5, 5
A rectangular pump extraction opening hole 2 including an upright part.
4a is bored, and this opening steel 24a is attached to a lid body 24b which is detachably attached with bolts or the like.
It is becoming blocked by the That is,
The lid 24b constitutes a part of the upper plate 24, and the upper end openings of the steel pipes 5, 5 are closed by the lid 24b. On the other hand, the partition plate 23 has a communication hole 23 a at the connection position of the lower end openings of the steel pipes 5 , 5 .
23a is bored. Therefore, the inside of each steel pipe 5, 5 communicates with the inside of the second box part 22 via the communication holes 23a, 23a.

Submersible pumps 6, 6 are disposed within the steel pipes 5, 5, as shown in FIGS. 2 and 3. These submersible pumps 6, 6 have a suction port 6a at the lower end,
A discharge port 6c is provided around the lower end of the motor section 6b provided at the top, and the suction port 6a is connected to the partition plate 2.
It is placed on the partition plate 23 in a state where it communicates with the communication hole 23a bored in the partition plate 3. The steel pipes 5, 5 are provided with discharge pipes 5a, 5a above the discharge ports 6c of the submersible pumps 6, 6, and water flows into the steel pipes 5, 5 through the discharge ports of these discharge pipes 5a, 5a. Backflow prevention valves 7, 7 are provided to prevent backflow. Note that the backflow prevention valves 7, 7 need to be provided so as not to protrude from the door body 2 so that they do not hit the ceiling wall of the culvert B when the door body 2 is raised and lowered.

Inside the second box portion 22, strainers 8, 8 are installed in communication holes 23a, 23a formed in the partition plate 23 to prevent foreign matter from entering.

Further, the door body 2 is provided with a sealing mechanism 9 on all four sides of the surface on the side of the culvert B, and as shown in FIG. 2, when the door body 2 closes the entrance of the culvert B,
Prevents water from leaking from the surrounding area.

The lifting rod 4 is connected to the upper surface of the door body 2, that is, the upper plate 24 of the first box part 21, at a position where the center of gravity in the flow direction is balanced.

Moreover, the steel pipe 5 equipped with the submersible pump 6 inside is
It is installed at approximately the center in the thickness direction of the first box part 21 of the door body 2 and at a symmetrical position within the first box part 21, so that the weight of the door body 2 in the thickness direction and the width direction is balanced. .

The water gate constructed as described above closes the gate body 2 to prevent any further water from flowing into the culvert B side when the water level in the culvert B becomes higher than the water level required for the intake channel A side. . If it is necessary to lower the water level on the intake channel A side after closing the door body 2,
By operating the submersible pumps 6, 6, the intake channel A
The water on the side is sucked through the opening of the second box part 22. Then, by force-feeding the sucked water to the discharge ports of the discharge pipes 5a, 5a through the steel pipes 5, 5 provided in the first box part 21, the water is transferred to the backflow prevention valve 7,
7 and is discharged to the culvert B side.

In addition, in the water gate, the upper plate 24 of the first box part 21
By removing the lid body 24b that constitutes the
The submersible pumps 6, 6 can be taken out from inside the door body 2.

In the above embodiment, the steel pipe 5 equipped with the submersible pump 6 inside is installed at approximately the center in the thickness direction of the first box part 21 of the door body 2 and at a symmetrical position inside the first box part 21. Although the weight of the door body 2 is balanced in the thickness direction and the width direction, one or three or more steel pipes 5 each having a submersible pump 6 therein may be installed. When installing one steel pipe 5 with the submersible pump 6 inside, it should be installed at approximately the center of the first box part 21 in the thickness direction so that the weight is balanced in the thickness direction and width direction of the door body 2. If three or more steel pipes 5 with submersible pumps 6 are installed inside, the door should be placed in the center in the width direction. It may be installed at approximately the center of the body 2 in the thickness direction and at a position symmetrical to the center in the width direction.
In addition, in the thickness direction and width direction of the door body 2,
The term "weight balanced" or "weight balanced position" does not mean only a strict state (position) in which the weight balance in the thickness direction and width direction of the door body 2 is completely unchanged; The weight imbalance within the allowable range is within the range where the weight is balanced in the thickness direction and width direction of the door body 2,
For example, there may be a slight weight imbalance due to the provision of a reinforcing member on the door body 2 to reinforce the door body 2,
A slight weight imbalance caused by attaching an accessory member or device to the door body 2 falls within the range where the weight is balanced in the thickness direction and width direction of the door body 2. In addition, in this example, an opening hole is formed in the upper plate of the first box part of the door body, and the lid body that closes this opening hole can be removed, making maintenance of the submersible pump extremely easy. However, in the present invention, it is not necessary to provide such an opening and a lid. Further, although the presence or absence of the bottom plate of the second box part does not matter, it is preferable to have no bottom plate as shown in FIG. 2 of the embodiment, since foreign matter will not accumulate inside the second box part.

[Effect of idea]

As described above, according to the water gate of the present invention, a large weight imbalance does not occur in the thickness direction and width direction of the gate body, so an excessive unbalanced load is not applied to the guide, and damage to the guide is prevented. be able to.

In addition, there is no large resistance between the door body and the guide when raising and lowering it, and there is no need to install heavy balance weights on the door body to balance the weight, so there is no need to install heavy balance weights on the door body to raise and lower the door body. Driving force can be significantly reduced.

Further, the door body is safe because there is no unbalance in weight in the thickness direction and the width direction.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the water gate according to the present invention, Fig. 2 is a vertical cross-sectional view of the main part in a state of use,
FIG. 3 is also a front view. 1... Water gate, 2... Door body, 21... First box section,
22... Second box part, 3, 3... Guide rail, 2
3... Partition plate (lower plate), 23a, 23a... Communication hole, 24, 24... Upper plate, 5, 5... Steel pipe, 5
a, 5a...Discharge pipe (discharge part), 6, 6...Submersible pump, 6a, 6a...Submersible pump, 6a, 6a
...Intake port, 7,7...Return prevention valve.

Claims (1)

[Scope of Claim for Utility Model Registration] In a water gate that opens and closes a waterway by raising and lowering the gate body along guides on both sides, a first water gate in which one of both sides in the thickness direction is open. A box-shaped door body 2 formed by connecting a second box part 22 whose other side is open on the lower side of the box part 21;
A pipe 5 is installed between the upper plate 24 and the lower plate 23, and the suction port 6a is arranged in the pipe 5 and communicates with the communication hole 23a formed in the lower plate 23 of the first box part 21. a submersible pump 6, a discharge part 5a provided in the pipe 5 above the discharge port 6c of the submersible pump 6, and a backflow prevention valve 7 provided at the discharge port of the discharge part 5a, The pipe 5 is equipped with a submersible pump 6 therein.
are installed in the first box part 21 at a position where the weight is balanced in the thickness direction and width direction of the door body 2.